Account books, ledgers, rentals, correspondence etc. relating to the estates of the Stewart family, Marquises of London-derry, mainly in Co. Down, with rental of Comber, 1684, accounts of Strangford Lough reclamation, 19th c., Cunningburn Mill, 1808-9, 18th to 20th c.

Míreanna comhchosúla

• Clare slob reclamation, including labourers employed, 1885-6, tide tables, 1885-7, graphs, drawings, etc.
• About 800 maps of the estates of the Stewart family, Marquises of Londonderry, in the Comber, Newtownards and Florida areas, Co. Down, including maps by John Sloane in the 1720's, by D. Geddes in the late 18th c., plans of buildings in Newtownards, Mountstewart demesne, Strangford Lough reclamation, roads etc. 1721 - c. 1850.
• A miscellaneous volume, containing an "Outline of a plan for cultivating the unreclaimed lands in Ireland", 19th cent.; extracts from an act to prevent the further growth of Popery, 1703; correspondence relating to lands forfeited in 1688, 1808.
• Waste land reclamation.
  Foilsithe / Cruthaithe: (1875)
• Drainage and reclamation of waste lands.
  Foilsithe / Cruthaithe: (1881)